Research on preparation and properties of environment-friendly solvent-free black material for masking existing road traffic markings

In order to reduce pavement damage during the course of eliminating existing road traffic markings, an environment-friendly black material for masking existing road traffic marking is prepared. This material is composed of two components, the main agent without solvent and curing agent. Firstly, the film forming substance of the main agent is prepared by polyurethane/epoxy resin IPN composite. Secondly, the main agent is composed of the film forming substance, black pigment, filler and additives. Through wear resistance test, pull-off test, compression test, compression-shear test, luminance factor test, chromaticity coordinates test and skid resistance test, and so on, comprehensive properties of the material are systematically researched. The results show that wear resistance, heat resistance, weathering resistance, anti-cracking performance at low temperature, chromaticity performance, compression-shear strength and antiskid ability of this material are excellent under the optimum formula, and that the material also has the characteristics of rapid construction (30 minutes after construction open to traffic) in low temperature (-10t), which makes this material especially suitable for masking existing road traffic marking in cold regions.